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EP0322001B1 - Apparatus for adjusting level of liquid to be filled into packaging tube - Google Patents

Apparatus for adjusting level of liquid to be filled into packaging tube Download PDF

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Publication number
EP0322001B1
EP0322001B1 EP88202557A EP88202557A EP0322001B1 EP 0322001 B1 EP0322001 B1 EP 0322001B1 EP 88202557 A EP88202557 A EP 88202557A EP 88202557 A EP88202557 A EP 88202557A EP 0322001 B1 EP0322001 B1 EP 0322001B1
Authority
EP
European Patent Office
Prior art keywords
level
tube
float
stopper
liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88202557A
Other languages
German (de)
French (fr)
Other versions
EP0322001A3 (en
EP0322001A2 (en
Inventor
Iwano C/O Shikoku Kakoki Co Ltd Fumiyuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shikoku Kakoki Co Ltd
Original Assignee
Shikoku Kakoki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Shikoku Kakoki Co Ltd filed Critical Shikoku Kakoki Co Ltd
Publication of EP0322001A2 publication Critical patent/EP0322001A2/en
Publication of EP0322001A3 publication Critical patent/EP0322001A3/en
Application granted granted Critical
Publication of EP0322001B1 publication Critical patent/EP0322001B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/12—Subdividing filled tubes to form two or more packages by sealing or securing involving displacement of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B3/26—Methods or devices for controlling the quantity of the material fed or filled
    • B65B3/30—Methods or devices for controlling the quantity of the material fed or filled by volumetric measurement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B57/00—Automatic control, checking, warning, or safety devices
    • B65B57/10—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged
    • B65B57/14—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged and operating to control, or stop, the feed of articles or material to be packaged
    • B65B57/145—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged and operating to control, or stop, the feed of articles or material to be packaged for fluent material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/64—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements
    • G01F23/72—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using magnetically actuated indicating means
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
    • G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S141/00—Fluent material handling, with receiver or receiver coacting means
    • Y10S141/01—Magnetic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S73/00—Measuring and testing
    • Y10S73/05—Liquid levels with magnetic transmission

Definitions

  • the present invention relates to an apparatus for use in a packaging machine wherein a vertical tube filled with a fluid food or like contents is divided into lengths each corresponding to one container to obtain intermediate containers, which are eventually made into rectangular parallelepipedal completed containers, the apparatus being adapted to adjust the level of the fluid or liquid to be filled into the tube to a predetermined level.
  • the conventional apparatus of the type mentioned above include one which comprises a vertical filling pipe covered with a packaging tube, a damper provided inside the filling pipe close to its lower end and pivotally movable upward or downward, an annular float fitted around the filling pipe upwardly or downwardly movably and positioned a small distance above the damper, and a connector connecting the movable end of the damper to the float.
  • the upward or downward movement of the float opens or closes the level of a liquid filling the tube.
  • the main object of the present invention is to obviate the above drawback and provide an apparatus for adjusting the level of a liquid filling a packaging tube.
  • This is obtained by using a known principle - see e.g. FR-A-2 540 259:
  • the present invention provides an apparatus for adjusting the level of the liquid to be filled in the packaging tube, comprising a flow control valve for controlling the flow of the liquid to be supplied to the filling pipe, a float for use as suspended in the liquid filled in the tube, characterised by a magnet attached to the float, a magnetic sensor for detecting from outside the tube variations in the intensity of magnetism due to the upward or downward movement of the magnet to produce an output signal, and a control unit for controlling the opening of the flow control valve in
  • the magnet attached to the float disposed inside the tube is detected by the magnetic sensor from outside the tube, and the flow of liquid to be supplied to the filling tube is adjusted by the flow control valve which is controlled in accordance with the output signal from the sensor. Since there is no need to provide any member within the filling pipe for controlling the valve, the apparatus is very efficient to clean and sterilize.
  • the drawing is a diagram showing the construction of an embodiment of the invention.
  • An aseptic chamber 11 in the form of a vertically elongated rectangular parallelepiped has upper and lower openings 12 and 13 formed in its top wall and bottom wall, respectively.
  • a filling pipe 14 extends through the aseptic chamber 11.
  • the pipe 14 is inverted L-shaped and comprises a vertical portion 15 and a horizontal portion 16.
  • the vertical portion 15 has a lower part projecting downward from the chamber 11 through the lower opening 13.
  • the horizontal portion 16 extends through a side wall of the chamber 11 outward therefrom and has a liquid supply pipe 17 connected to its outer end.
  • upper and lower groups of squeeze rollers 18, 19 are arranged around the vertical portion 15 within the aseptic chamber 11.
  • a web of packaging material, W is fed into the aseptic chamber 11 through the upper opening 12 and shaped into a tube T by being caused to cover the vertical portion 15 by the rollers 18, 19.
  • the tube T is led out of the chamber 11 through the lower opening 13.
  • the vertical portion 15 has a lower end opening, under which an unillustrated container shaping apparatus is provided for dividing the tube T into lengths each corresponding to one container to obtain intermediate containers C and for closing the lower end of the tube T.
  • the vertical portion 15 has an annular stopper 21 on the part thereof projecting downward from the aseptic chamber 11.
  • a hollow cylindrical float 22 is disposed below the stopper 21.
  • the stopper 21 is positioned at such a level that when the level of a liquid filling the tube T is a predetermined level, the float 22 suspended in the liquid is in contact with the stopper 21.
  • the float 22 is fitted around the vertical portion 15 within the tube T and is free to move upward or downward.
  • An annular magnet 23 is attached to the upper surface of the float 22 at its upper end.
  • a magnetic sensor 24 is disposed outside the tube T at a position slightly below the stopper 21. The sensor 24 converts variations in the intensity of the magnetism to produce an electric signal.
  • the sensor 24 produces a high level signal when the spacing between the stopper 21 and the float is less than a predetermined distance or a low level signal when the spacing is not smaller than the predetermined distance.
  • the liquid supply pipe 17 is provided with a flow control valve 25 operated by a solenoid 26, which in turn is controlled by a control unit 27.
  • the output signal of the magnetic sensor 24 is fed to the control unit 27.
  • One of the liquid supply pipe 17, a hot air pipe 29 and a steam pipe 30 is selectively connected to the inlet of the flow control valve 25 by three-way valve 28.
  • the hot air pipe 29 is provided with a chamber 31 for spraying an aqueous solution of hydrogen peroxide.
  • the flow control valve 25 is set to two flow rates: an excessive rate exceeding a standard amount to be filled per unit time by a unit amount, and a deficient rate less than the standard amount by the unit amount.
  • the control unit 27 controls the opening of the valve 25 to the deficient rate when the magnetic sensor 24 produces the high level signal or to the excessive rate when the sensor 24 produces the low level signal.
  • the magnetic sensor produces two signals, i.e., the high level signal and the low level signal, permitting the flow control valve to control the flow to two rates, i.e., high and low
  • the flow rate may alternatively be controlled steplessly.
  • a solenoid operated proportional valve is used as the flow control valve, and the magnetic sensor is adapted to produce a signal gradually lowering from a high level to a low level in proportion to an increase in the distance between the stopper and the float, so that the opening of the flow control valve is controlled to give a flow rate which gradually increases as the output signal level lowers.
  • upper and lower magnetic sensors may be arranged at different positions to adjust the liquid level in accordance with the output signals of these sensors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Automation & Control Theory (AREA)
  • Basic Packing Technique (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
  • Examining Or Testing Airtightness (AREA)

Description

  • The present invention relates to an apparatus for use in a packaging machine wherein a vertical tube filled with a fluid food or like contents is divided into lengths each corresponding to one container to obtain intermediate containers, which are eventually made into rectangular parallelepipedal completed containers, the apparatus being adapted to adjust the level of the fluid or liquid to be filled into the tube to a predetermined level.
  • The conventional apparatus of the type mentioned above include one which comprises a vertical filling pipe covered with a packaging tube, a damper provided inside the filling pipe close to its lower end and pivotally movable upward or downward, an annular float fitted around the filling pipe upwardly or downwardly movably and positioned a small distance above the damper, and a connector connecting the movable end of the damper to the float. The upward or downward movement of the float opens or closes the level of a liquid filling the tube.
  • It is strongly required that recent machines for preparing aseptic products be antiseptic. To meet this requirement, the machine must be highly amenable to cleaning and sterilization, whereas the conventional apparatus described has the damper within the filling pipe and can not therefore be cleaned and sterilized efficiently. Especially, the pin supporting the damper for pivotal movement poses problems.
  • The main object of the present invention is to obviate the above drawback and provide an apparatus for adjusting the level of a liquid filling a packaging tube. This is obtained by using a known principle - see e.g. FR-A-2 540 259:
       For use in a packaging machine adapted to cover a vertical portion of a filling pipe with a packaging tube, close the lower end of the tube at a position below the vertical portion and fill a liquid into the tube to a predetermined level from a lower end opening of the vertical portion, the present invention provides an apparatus for adjusting the level of the liquid to be filled in the packaging tube, comprising a flow control valve for controlling the flow of the liquid to be supplied to the filling pipe, a float for use as suspended in the liquid filled in the tube, characterised by a magnet attached to the float, a magnetic sensor for detecting from outside the tube variations in the intensity of magnetism due to the upward or downward movement of the magnet to produce an output signal, and a control unit for controlling the opening of the flow control valve in accordance with the output signal of the magnetic sensor, said flow control valve being remote from the lower end of the pipe.
  • According to the present invention, the magnet attached to the float disposed inside the tube is detected by the magnetic sensor from outside the tube, and the flow of liquid to be supplied to the filling tube is adjusted by the flow control valve which is controlled in accordance with the output signal from the sensor. Since there is no need to provide any member within the filling pipe for controlling the valve, the apparatus is very efficient to clean and sterilize.
  • The drawing is a diagram showing the construction of an embodiment of the invention.
  • An embodiment of the invention will be described below in detail with reference to the drawing.
  • An aseptic chamber 11 in the form of a vertically elongated rectangular parallelepiped has upper and lower openings 12 and 13 formed in its top wall and bottom wall, respectively. A filling pipe 14 extends through the aseptic chamber 11. The pipe 14 is inverted L-shaped and comprises a vertical portion 15 and a horizontal portion 16. The vertical portion 15 has a lower part projecting downward from the chamber 11 through the lower opening 13. The horizontal portion 16 extends through a side wall of the chamber 11 outward therefrom and has a liquid supply pipe 17 connected to its outer end. Although not shown in detail, upper and lower groups of squeeze rollers 18, 19 are arranged around the vertical portion 15 within the aseptic chamber 11. A web of packaging material, W, is fed into the aseptic chamber 11 through the upper opening 12 and shaped into a tube T by being caused to cover the vertical portion 15 by the rollers 18, 19. The tube T is led out of the chamber 11 through the lower opening 13. The vertical portion 15 has a lower end opening, under which an unillustrated container shaping apparatus is provided for dividing the tube T into lengths each corresponding to one container to obtain intermediate containers C and for closing the lower end of the tube T.
  • The vertical portion 15 has an annular stopper 21 on the part thereof projecting downward from the aseptic chamber 11. A hollow cylindrical float 22 is disposed below the stopper 21. The stopper 21 is positioned at such a level that when the level of a liquid filling the tube T is a predetermined level, the float 22 suspended in the liquid is in contact with the stopper 21. The float 22 is fitted around the vertical portion 15 within the tube T and is free to move upward or downward. An annular magnet 23 is attached to the upper surface of the float 22 at its upper end. A magnetic sensor 24 is disposed outside the tube T at a position slightly below the stopper 21. The sensor 24 converts variations in the intensity of the magnetism to produce an electric signal. More specifically, the sensor 24 produces a high level signal when the spacing between the stopper 21 and the float is less than a predetermined distance or a low level signal when the spacing is not smaller than the predetermined distance. On the other hand, the liquid supply pipe 17 is provided with a flow control valve 25 operated by a solenoid 26, which in turn is controlled by a control unit 27. The output signal of the magnetic sensor 24 is fed to the control unit 27. One of the liquid supply pipe 17, a hot air pipe 29 and a steam pipe 30 is selectively connected to the inlet of the flow control valve 25 by three-way valve 28. The hot air pipe 29 is provided with a chamber 31 for spraying an aqueous solution of hydrogen peroxide.
  • The flow control valve 25 is set to two flow rates: an excessive rate exceeding a standard amount to be filled per unit time by a unit amount, and a deficient rate less than the standard amount by the unit amount. The control unit 27 controls the opening of the valve 25 to the deficient rate when the magnetic sensor 24 produces the high level signal or to the excessive rate when the sensor 24 produces the low level signal.
  • Although the above embodiment is so adapted that the magnetic sensor produces two signals, i.e., the high level signal and the low level signal, permitting the flow control valve to control the flow to two rates, i.e., high and low, the flow rate may alternatively be controlled steplessly. In this case, a solenoid operated proportional valve is used as the flow control valve, and the magnetic sensor is adapted to produce a signal gradually lowering from a high level to a low level in proportion to an increase in the distance between the stopper and the float, so that the opening of the flow control valve is controlled to give a flow rate which gradually increases as the output signal level lowers.
  • Furthermore, upper and lower magnetic sensors may be arranged at different positions to adjust the liquid level in accordance with the output signals of these sensors.

Claims (3)

  1. In a packaging machine adapted to cover a vertical portion of a filling pipe (14) with a packaging tube, close the lower end of the tube at a position below the vertical portion and fill a liquid into the tube to a predetermined level from a lower end opening of the vertical portion, an apparatus for adjusting the level of the liquid to be filled to the packaging tube, comprising:
       a flow control valve (25) for controlling the flow of the liquid to be supplied to the filling pipe,
       a float (22) for use as suspended in the liquid filled in the tube, characterised by
       a magnet (23) attached to the float,
       a magnetic sensor (24) for detecting from outside the tube variations in the intensity of magnetism due to the upward or downward movement of the magnet to produce an output signal, and
       a control unit (27) for controlling the opening of the flow control valve in accordance with the output signal of the magnetic sensor, said flow control valve being remote from the lower end of the pipe.
  2. An apparatus as defined in claim 1 wherein the filling pipe is provided with a stopper (21) for restraining the float from moving upward, the stopper being positioned at a level permitting the float to be in contact with the stopper when the level of the liquid filling the tube is the predetermined level, the magnetic sensor being operable to produce a high level signal when the spacing between the stopper and the float is less than a predetermined distance or a low level signal when the spacing is not smaller than the predetermined distance, the flow control valve having two flow rate settings, one of the settings being an excessive rate exceeding a standard amount to be filled per unit time by a unit amount, the other setting being a deficient rate less than the standard amount by the unit amount, the control unit being operable to control the opening of the flow control valve to the deficient rate when the magnetic sensor produces the high level signal or to control the valve opening to the excessive rate when the magnetic sensor produces the low level signal.
  3. An apparatus as defined in claim 1 wherein the filling pipe is provided with a stopper (21) for restraining the float from moving upward, the stopper being positioned at a level permitting the float to be in contact with the stopper when the level of the liquid filling the tube is the predetermined level, the magnetic sensor being operable to produce a signal gradually lowering from a high level to a low level in proportion to an increase in the distance between the stopper and the float, the flow control valve being a solenoid operated proportional valve, the control unit being operable to control the opening of the flow control valve to a flow rate gradually increasing as the level of the output signal of the magnetic sensor lowers.
EP88202557A 1987-11-20 1988-11-16 Apparatus for adjusting level of liquid to be filled into packaging tube Expired - Lifetime EP0322001B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP177705/87 1987-11-20
JP1987177705U JPH0635921Y2 (en) 1987-11-20 1987-11-20 Level controller for filling liquid level in packaging tube

Publications (3)

Publication Number Publication Date
EP0322001A2 EP0322001A2 (en) 1989-06-28
EP0322001A3 EP0322001A3 (en) 1990-03-14
EP0322001B1 true EP0322001B1 (en) 1992-07-29

Family

ID=16035665

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88202557A Expired - Lifetime EP0322001B1 (en) 1987-11-20 1988-11-16 Apparatus for adjusting level of liquid to be filled into packaging tube

Country Status (5)

Country Link
US (1) US4958665A (en)
EP (1) EP0322001B1 (en)
JP (1) JPH0635921Y2 (en)
DE (1) DE3873295T2 (en)
NO (1) NO175711C (en)

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Also Published As

Publication number Publication date
JPH0635921Y2 (en) 1994-09-21
JPH0182102U (en) 1989-06-01
DE3873295D1 (en) 1992-09-03
EP0322001A3 (en) 1990-03-14
NO175711C (en) 1994-11-23
NO885134L (en) 1989-05-22
DE3873295T2 (en) 1992-12-10
EP0322001A2 (en) 1989-06-28
NO885134D0 (en) 1988-11-17
US4958665A (en) 1990-09-25
NO175711B (en) 1994-08-15

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